Laboratory Corporation of America (LH) had the highest return between 1988 and 1990 by a US stock, returning 4,310,060%.

ASSET	YEARS	% RETURN
Laboratory Corporation of America (LH)	1988-1990	4,310,060%
Aegon NV ADR (AEG)	1988-1990	4,858.73%
Powell Industries (POWL)	1988-1990	1,445.45%
Argan (AGX)	1988-1990	1,005.26%
Telefonaktiebolaget LM Ericsson B ADR (ERIC)	1988-1990	719.27%
Utah Medical Products (UTMD)	1988-1990	717.28%
Weatherford International (WFRD)	1988-1990	646.67%
UnitedHealth (UNH)	1988-1990	565.89%
Nike (NKE)	1988-1990	515.5%
Nabors Industries (NBR)	1988-1990	400%
Devon Energy (DVN)	1988-1990	384.19%
AutoNation (AN)	1988-1990	379.76%
Cardinal Health (CAH)	1988-1990	339.74%
Home Depot (HD)	1988-1990	339.54%
US Bancorp (USB)	1988-1990	336.35%
Quantum (QMCO)	1988-1990	329.81%
Oceaneering International (OII)	1988-1990	327.3%
Glacier Bancorp (GBCI)	1988-1990	315.3%
Barnwell Industries (BRN)	1988-1990	311.66%
Johnson Controls International (JCI)	1988-1990	307.59%
HF Sinclair (DINO)	1988-1990	306.82%
Cracker Barrel Old Country Store (CBRL)	1988-1990	299.09%
Amgen (AMGN)	1988-1990	298.48%
Logility Supply Chain Solutions (LGTY)	1988-1990	297.43%
Cadence Design Systems (CDNS)	1988-1990	291.38%